2026 EuroLLVM - Anatomy of Tiling and Vectorizing linalg.pack and linalg.unpack

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2026 EuroLLVM Developers' Meeting

https://llvm.org/devmtg/2026-04/

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Title: Anatomy of Tiling and Vectorizing linalg.pack and linalg.unpack

Speaker: Ege Beysel

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Slides: https://llvm.org/devmtg/2026-04/slides/quick_talk/quick_talk_beysel.pdf

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linalg.pack and linalg.unpack enable explicit data-tiling and layout transformations in MLIR, but their use in data-tiled compilation flows raises subtle questions about alignment, legality, and vectorization. This talk explores how these operations interact with MLIR's tiling and vectorization infrastructure, focusing on alignment constraints, masking semantics, and performance implications. Using an end-to-end data-tiled matmul example, the talk highlights practical guidance and performance gains for developers building high-performance tensor pipelines.

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